I have latest offical firmware v.757-75 in my C-8080 and couple of dead pixels. Built in Pixel Mapping function does nothing with them.

I have noticed lot of requests to send v.757-78 firmware and considering to update my camera as well. I'm wondering if anybody who did the update can confirm that it really eliminates dead pixels. Is there anybody who managed to get rid of at least some dead pixels using any firmware after v.757-75?